CN110184542A - A kind of performance seamlessization is continuously managed and its manufacturing method - Google Patents
A kind of performance seamlessization is continuously managed and its manufacturing method Download PDFInfo
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- CN110184542A CN110184542A CN201910529764.2A CN201910529764A CN110184542A CN 110184542 A CN110184542 A CN 110184542A CN 201910529764 A CN201910529764 A CN 201910529764A CN 110184542 A CN110184542 A CN 110184542A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/10—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies
- C21D8/105—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies of ferrous alloys
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/42—Ferrous alloys, e.g. steel alloys containing chromium with nickel with copper
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/44—Ferrous alloys, e.g. steel alloys containing chromium with nickel with molybdenum or tungsten
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/48—Ferrous alloys, e.g. steel alloys containing chromium with nickel with niobium or tantalum
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
- C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
Abstract
It is continuously managed the invention discloses a kind of performance seamlessization and its manufacturing method, comprising: pricked by high cleanliness refining, continuous casting technology, thermal control and control the techniques such as cold, pickling and prepare continuous pipe special-purpose board；It is docked by roll bending slitting, steel band, row-roll forming process and the high-frequency induction welding technology with protective gas prepare pipe；To same specification pipe hot rolling reducing process, the outer warp such as continuously produces or become the tubing of outer diameter；Tubing destressing is handled, realizing reduces pipe residual stress, improves tubing toughness, reduces tubing hardness, obtains the good continuous pipe product of comprehensive performance.Continuous pipe properties of product of the invention meet API standard requirement；Hot rolling tube reducing technology refines tubing circumferential direction and longitudinal seam tissue significantly, reaches unanimity with base material tissue, realizes that physical seamlessness increases the service life and operational security of continuous pipe to effectively increase continuous pipe overall performance；The progress of continuous pipe operation technique is greatly pushed, market application prospect is wide.
Description
Technical field:
The present invention relates to petroleum gas tubing technical fields, and in particular to a kind of performance seamlessization is continuously managed and its made
Make method.
Background technique:
Continuous pipe (Coiled tubing, abbreviation CT) is for normal thread connected pipes, also known as continuously
Pipe, coiled tubing, coiled pipe or coil pipe can be wrapped on major diameter drum, be connected together by several segments steel band, formed,
The length being welded reaches thousands of meters of oil-gas pipe material.Continuous pipe continuous in oil well, efficient tripping in or can rise, for oil
The fields such as field well workover, drilling well, complete well, well logging, volume increase, oil recovery, gas production, have run through the overall process of oil-gas mining, operating efficiency
It is high, have a wide range of application, can the unique advantages such as Operating Pressure, favored by oil field user, continuous Manifold technology is opened in exploration of oil and gas field
Increasingly important role is played in hair.
Continuous pipe is the critical component that above-mentioned operation technique is able to smoothly implement, and dosage is big, quality requirement is high.But due to even
Continuous pipe Service Environment is severe, and stress condition is complicated, is also easy to produce the structure ageing problem of complicated multiplicity.It is a plurality of in the continuous pipe of one disk
Steel band docking is formed by multiple circumferential welded seams and is usually the " thin of whole coil pipe material through continuous, the longitudinal seam of tube body overall length
It is weak " position.Studies have shown that the root for causing continuous pipe that the Problem of Failure such as thorn leakage, fracture, corrosion occur mostly is welded with circumferential, longitudinal
It is sewed with pass.
Existing continuous pipe manufacturing technology, no matter import is continuously managed or domestic continuous pipe, and no matter tubing grade of steel, specification are equal
" problem source " easily is formed in circumferential or longitudinal seam position, in " problem source " easily germinating of induced defect and is grown up, final tubing
Different types of failure is presented, the continuous pipe of whole disk is gently then caused to scrap, it is heavy then occur tubing string fall well or toxic and harmful gas leakage,
It will cause great human and material resources loss, or even the accident that creates greater casualties.For continuous pipe weld seam problem, Chinese patent
" a kind of welding defect coiled tubing and manufacturing method " disclosed in ZL201410674059.9, to steel band butt weld using plus
Heat, punching press, tempering process；Longitudinal seam reaches tubing pressure using local heating, compression roller, weld seam is applied centainly
Deformation quantity, welded seam area quenching technical.The patent can improve seam organization, improve Weld Performance, but the circumferential direction of continuous pipe
And longitudinal seam still remains, tube body weld seam still falls within weak area compared with base material, and structure ageing is caused in circumferential or longitudinal seam position
The problem of do not solved from basic.
Summary of the invention:
It is an object of the invention to overcome the above-mentioned prior art, provide a kind of performance seamlessization continuously manage and its
Manufacturing method by the way that the continuous pipe product of two kinds of outer diameter of equal outer warp and change may be implemented to pipe hot rolling tube reducing, while making tubing
Circumferential and longitudinal seam tissue significantly refines, and the tissue and performance for reaching weld seam and base material reach unanimity, and realizes physical seamlessness,
Continuous pipe overall performance is effectively improved, to increase the service life and operational security of continuous pipe.
To achieve the above object, the technical solution adopted by the present invention is that: a kind of performance seamlessization is continuously managed, continuous pipe
Plate chemical component is by weight percent are as follows: C:0.03-0.16%；Si:0.15-0.50%；Mn:0.5-1.8%；P :≤
0.009%；S :≤0.003%；Cu:0.15-0.8%；Cr:0.4-6.0%；Ni:0.1-0.6%；Mo:0.2-0.8%；Ti:
0.01-0.08%；Nb:0.02-0.1%, remaining is Fe and inevitable impurity.
The manufacturing method of the above-mentioned continuous pipe of performance seamlessization, comprising the following steps:
(1) prepare roll bending: carrying out pre- desulfurization process for molten iron as main material, successively by top and bottom combined blown converter smelting,
Alloy fine tuning, LF heating desulfurization, RH vacuum decarburization and Ca processing, make the composition quality percentage of molten steel reach above-mentioned requirements
Tapping is poured continuous casting billet, casts slab using continuous casting technology application dynamic soft-reduction and electromagnetic agitation；It is thermomechanical by multi-pass
Controlled rolling technique (TMPC) prepares the hot-rolled coil of 2.4-7.1mm thickness, after pickling, finishing, detection, through tension crimping machine
Roll bending is curled into use for tubulation；
(2) it roll bending slitting and butt welding spreading: by the roll bending prepared according to pipe specification requirement, is cut by slitting line
For defined width steel band；Using agitating friction weldering, plasma landfilling area or CO2Gas shielded arc welding is docked by 40-50 ° of inclined weld
Method so that steel band is connected to target length；Multi-pass heating and deformation process are carried out to optimize weld seam group to steel band banjo fixing butt jointing
It knits, reconditioning and non-destructive testing is carried out to welded seam area.
(3) pipe is prepared: through row's bending molding behind docking steel band milling side, using the method (HFW) of HFI welding
It is welded into pipe, entire welding process uses the nitrogen of purity >=99.7%, welds under continuous gas protection；Angular aperture θ control
At 4-8 °, the amount of compression of weld seam is controlled in 2.0-5.0mm, speed of welding 15-25m/min system；The instant butt welding of postwelding is practiced midwifery life
The inside and outside burr removing of weld seam to state concordant with tube body inner and outer surfaces；Hot place is carried out to weld seam by mid-frequency induction heating
Reason, weld seam is heated rapidly to 900-960 DEG C, then controls weld seam cooling velocity under nitrogen protection, when being cooled to 350-400 DEG C
Carry out water cooling；
(4) pipe hot rolling tube reducing: the composite heating mode for using intermediate-frequency heating furnace and Muffle furnace to combine is by pipe with 20-
The rate of heat addition of 50 DEG C/s quickly heats up to 900-1020 DEG C；Then pipe enters hot rolling tube reducing unit, passes through compression roller multiple tracks
Secondary thermo-mechanical rolling and hot tensile strength tube reducing obtains the continuous pipe of required specification, and caliber reduction amount is in 4-8% per pass；Pass through reality
When control system hot rolling tube reducing unit is accurately adjusted, adjust caliber, wall thickness in real time, reach the goal standard of design；Meanwhile
Hot rolling tube reducing refines tubing circumferential direction and longitudinal seam tissue significantly, reaches with base material close to unanimously, realizes physical seamlessness；
(5) tube body destressing is handled: tube body being heated rapidly to 400-700 DEG C with intermediate frequency furnace, then with 10-20 DEG C/s's
For cooling rate to 250-350 DEG C of progress water cooling, realizing reduces pipe residual stress, improves tubing toughness, reduces tubing hardness, obtains comprehensive
Close continuous pipe product of good performance；Continuous pipe surface after cooling is finally applied into preservative, is carried out on continuous coiling machine
Curling, the performance seamlessization for obtaining required length are continuously managed.
The concrete technology of multi-pass heating and deformation process is carried out in above-mentioned (2) to steel band banjo fixing butt jointing: being heated rapidly to
890 ± 20 DEG C → naturally cool to 840 ± 20 DEG C；Be heated rapidly to 940 ± 20 DEG C → naturally cool to 840 ± 20 DEG C；Quickly
Rolling or forging and pressing for 5-7 ton force is carried out to weld seam after being heated to 980 ± 20 DEG C；550-650 DEG C is heated rapidly to after natural cooling
It anneals.
Include by the continuous pipe tube body that the thermo-mechanical rolling of compression roller multi-pass and hot tensile strength tube reducing obtain in above-mentioned (4)
Deng two kinds of outer diameter of outer warp and change；The external diametrical extent of the equal continuous pipe of outer diameters is Φ 25.4- Φ 88.9mm；Become outer diameter continuously to manage, it is single
Continuous pipe can change for two or more outer diameters or be the linear continuous gradation of outer diameter, caliber range Φ 25.4- Φ
88.9mm。
The wall thickness range of the above-mentioned continuous pipe of performance seamlessization is 2.4-7.6mm, length range 100-8000m.It can be with
It is wound on the reel of appropriate core diameter, to transport and to use.
The beneficial effects of the present invention are:
1, the present invention provides the chemical component of one group of continuous pipe of performance seamlessization, feature is the elements such as C, Si, Mn, Cr
Range is wide, can produce superhigh intensity or the properties such as low Cr is anti-corrosion are continuously managed；To the harmful elements strict control such as P, S, favorably
In the fatigue property for improving continuous pipe.
2, the present invention provides matched roll bending manufacturing technologies, refine work using the LF+RH duplex of whole process ultra-clean degree
Skill realizes depth degassing, decarburization, desulfurization, dephosphorization；Continuous casting casts technology using dynamic soft-reduction and electromagnetic agitation, increases in slab
The consistency of the heart improves the uniformity of chemical component, reduces center segregation of casting blank, ensure that the high quality of continuous pipe roll bending.
3, the present invention is conducive to optimize weld seam by carrying out multi-pass heating and deformation process technique to steel band banjo fixing butt jointing
Tissue, prevents welding point from softening, and improves steel belt lacing quality；It, can be with by same specification pipe hot rolling reducing process
It the outer warp such as continuously produces and becomes the tubing of outer diameter；Meanwhile hot rolling tube reducing refines tubing circumferential direction and longitudinal seam tissue significantly,
Reach with base material close to unanimously, physical seamlessness is realized, so that continuous pipe overall performance is effectively improved, to increase continuous pipe
Service life and operational security.
Detailed description of the invention:
Fig. 1 is the equal continuous pipe schematic diagram of outer diameters of the invention.
Fig. 2 is the continuous pipe schematic diagram of ladder-like continuous gradation-change outer diameter of the invention.
Fig. 3 is the continuous pipe schematic diagram of LINEAR CONTINUOUS gradual change-change outer diameter of the invention.
Fig. 4 is continuous pipe longitudinal seam pattern under the continuous pipe manufacturing process of tradition, and weld seam decarburization is obvious.
Fig. 5 is continuous pipe longitudinal seam pattern after hot rolling tube reducing of the invention, and weld seam realizes physical seamlessness.
Specific embodiment:
The present invention is described in further details with reference to the accompanying drawing:
By Φ 73 × 3.8mm specification pipe, the CT90 grade of steel performance seamlessization for producing 3 kinds of geometries is continuous
Pipe, main manufacturing steps are as follows:
The chemical component mass percent of plate is as follows: C:0.1%；Si:0.35%；Mn:0.5%；P:0.005%；S:
0.0008%；Cu:0.45%；Cr:0.65%；Ni:0.20%；Mo:0.3%；Ti:0.015%；Nb:0.03%, remaining is Fe
And inevitable impurity.
1, by molten iron pre-desulfurization, smelting, blending gold, LF+RH, Ca processing, it is casting continuously to form the slab of 100mm thickness；It is heated to
1200 DEG C of roughing, 780-860 DEG C of finish rolling to 3.8mm are used for tubulation through pickling, finishing, curling, are rolled up at 450-550 DEG C
It takes.
2, roll bending slitting and spreading
By roll bending slitting at the steel band of wide 226mm, by the end machining of two steel bands in front and back it is at 45 ° after filled out by plasma
Wire bond docking；Steel band banjo fixing butt jointing carries out multi-pass heating and deformation process, concrete technology: being heated rapidly to 890 DEG C → nature
It is cooled to 840 DEG C；Be heated rapidly to 940 DEG C → naturally cool to 840 DEG C；6 ton forces are carried out to weld seam after being heated rapidly to 980 DEG C
Roll；600 DEG C of annealing are heated rapidly to after natural cooling, to welded seam area reconditioning and non-destructive testing, extremely by steel band spreading
5200 meters.
3, pipe is prepared
Steel band mill side after through row bending molding, pipe is welded into using the method for HFI welding, using purity >=
99.7% nitrogen gas protects welding.At 6 °, the amount of compression of weld seam is controlled in 5mm, speed of welding 22m/ for angular aperture θ control
min.Postwelding removes the inside and outside burr of weld seam to state concordant with tube body inner and outer surfaces.Weld seam mid-frequency induction heating to 930 DEG C,
380 DEG C of water coolings are cooled under nitrogen protection.Preparing specification is 73 × 3.8mm of Φ deburring pipe.
4, pipe hot rolling tube reducing
Three kinds of geometry can be prepared by controlling hot rolling tube reducing unit using the above-mentioned Φ 73 × 3.8mm pipe prepared
The tubing of shape, the method is as follows:
(1) it prepares the outer diameters such as 50.8 × 4.0mm of φ continuously to manage, as shown in Figure 1.
73 × 3.8mm of Φ pipe is heated to 1000 DEG C with 40 DEG C/s；Into hot rolling tube reducing unit, squeezed by 1-5 passage
Pressure roller mechanical press tube reducing is prepared 50.8 × 4.0mm of φ and is continuously managed, length 5000m.Wherein, preceding 3 passage caliber deflection
8%, caliber is sequentially reduced as 67.16mm → 61.79mm → 56.84mm；4th passage caliber deflection 5%, caliber are
53.99mm, the 5th passage caliber subtract deflection 6%, caliber 50.8mm；By hot rolling extrusion process, by tube wall thickness by
3.8mm is increased to 4.0mm；Meanwhile hot rolling squeezes tube reducing process, refines tubing circumferential direction and longitudinal seam tissue significantly, with mother
The tissue and performance of material reach unanimity, and realize weld seam physical seamlessness.
(2) preparation φ (60.3-50.8-44.5) × 4.4mm becomes outer diameter and continuously manages, as shown in Figure 2.
73 × 3.8mm of Φ pipe is heated to 1000 DEG C with 40 DEG C/s；Into hot rolling tube reducing unit, squeezed by 1-3 passage
Pressure roller mechanical press tube reducing, deflection 6%, prepares 60.3 × 4.4mm of φ and continuously manages per pass, and 1000 meters of length；4-6 passage
Compression roller intervention squeezes tube reducing, and deflection is followed successively by 6%, 6%, 5%, prepares 50.8 × 4.4mm of φ and continuously manage, length 2000
Rice；The intervention of 7-9 passage compression roller squeezes tube reducing, and deflection is followed successively by 4%, 4%, 5%, it is continuous to prepare 44.5 × 4.4mm of φ
Pipe, 2000 meters of length；It is changed linearly between each various outer diameter.
(3) preparation φ (60.3-44.5) × 4.4mm continuously becomes outer diameter and continuously manages, as shown in Figure 3.
73 × 3.8mm of Φ pipe is heated to 1000 DEG C with 40 DEG C/s；Into hot rolling tube reducing unit, by control system,
Tubulation length 5000m is inputted, caliber change 60.3-44.5mm, wall thickness change 3.8-4.4mm can be designed change per pass
The intervention time that shape amount and different passage squeeze prepares φ (60.3-44.5) × 4.4mm and continuously becomes outer diameter and continuously manages.
5, tube body destressing is handled
Tube body is heated to 550 DEG C, is cooled to 250-350 DEG C of water cooling, to reduce the remnants during tube body hot rolling tube reducing
Stress improves tubing toughness, reduces tubing hardness；Tube surfaces apply preservative, are curled into disk, obtain the high property of required length
It can the continuous pipe product of seamless process.
6, main performance
The CT90 grade of steel for the three kinds of geometries prepared using the above method is continuously managed, and properties of product are able to satisfy API
Spec 5ST standard requirements, for object performance testing result as shown in table 1, table 2, metallographic structure is as shown in Figure 5.Pass through Tables 1 and 2
It can be seen that the continuous pipe properties of product of performance seamlessization of this method production meet API standard requirement.It can by Fig. 4 and Fig. 5
To find out: the optimization of tubing of the present invention seam organization is significant, reaches unanimity with base material tissue, physical seamlessness, can increase continuous
The service life and operational security of pipe；Using same specification pipe, three kinds of geometries can be produced and continuously managed, Neng Gouman
Continuous pipe operation under sufficient complex hole condition, has greatly pushed the progress of continuous pipe operation technique, and market application prospect is wide.
1 tubing main performance testing results of table
The Metallographic Analysis result of weld seam shown in 2 Fig. 5 of table
Claims (4)
1. a kind of performance seamlessization is continuously managed, it is characterised in that: the plate chemical component of continuous pipe is by weight percent are as follows: C:
0.03-0.16%；Si:0.15-0.50%；Mn:0.5-1.8%；P :≤0.009%；S :≤0.003%；Cu:0.15-
0.8%；Cr:0.4-6.0%；Ni:0.1-0.6%；Mo:0.2-0.8%；Ti:0.01-0.08%；Nb:0.02-0.1%,
Remaining is Fe and inevitable impurity.
2. a kind of manufacturing method of the continuous pipe of performance seamlessization according to claim 1, it is characterised in that: including following
Step:
(1) it prepares roll bending: carrying out pre- desulfurization process for molten iron as main material, successively pass through top and bottom combined blown converter smelting, alloy
Fine tuning, LF heating desulfurization, RH vacuum decarburization and Ca processing, so that the composition quality percentage of molten steel is reached above-mentioned requirements can go out
Steel is poured continuous casting billet, casts slab using continuous casting technology application dynamic soft-reduction and electromagnetic agitation；It is thermomechanically controlled by multi-pass
Rolling mill practice processed prepares the hot-rolled coil of 2.4-7.1mm thickness, after pickling, finishing, detection, crimps through tension crimping machine coiled
Plate is used for tubulation；
(2) it roll bending slitting and butt welding spreading: by the roll bending prepared according to pipe specification requirement, is cut by slitting line as rule
Fixed width degree steel band；Using agitating friction weldering, plasma landfilling area or CO2Gas shielded arc welding, the side docked by 40-50 ° of inclined weld
Method makes steel band be connected to target length；To the progress multi-pass heating of steel band banjo fixing butt jointing and deformation process to optimize seam organization,
Reconditioning and non-destructive testing are carried out to welded seam area；
(3) it prepares pipe: through row's bending molding behind docking steel band milling side, being welded using the method (HFW) of HFI welding
At pipe, entire welding process uses the nitrogen of purity >=99.7%, welds under continuous gas protection；Angular aperture θ control exists
4-8 °, the amount of compression of weld seam is controlled in 2.0-5.0mm, speed of welding 15-25m/min；The instant butt welding of postwelding is practiced midwifery raw weldering
Inside and outside burr removing is stitched to state concordant with tube body inner and outer surfaces；Weld seam is heat-treated by mid-frequency induction heating, is welded
Seam is heated rapidly to 900-960 DEG C, weld seam cooling velocity is then controlled under nitrogen protection, when being cooled to 350-400 DEG C of progress
Water cooling；
(4) pipe hot rolling tube reducing: the composite heating mode for using intermediate-frequency heating furnace and Muffle furnace to combine is by pipe with 20-50
DEG C/rate of heat addition of s quickly heats up to 900-1020 DEG C；Then pipe enters hot rolling tube reducing unit, passes through compression roller multi-pass
Thermo-mechanical rolling and hot tensile strength tube reducing obtain the continuous pipe of required specification, caliber reduction amount is in 4-8% per pass；By real-time
Control system accurately adjusts hot rolling tube reducing unit, adjusts caliber, wall thickness in real time, reaches the goal standard of design；Meanwhile heat
Rolling tube reducing refines tubing circumferential direction and longitudinal seam tissue significantly, reaches with base material close to unanimously, realizes physical seamlessness；
(5) tube body destressing is handled: tube body being heated rapidly to 400-700 DEG C with intermediate frequency furnace, then with the cooling rate of 10-20 DEG C/s
To 250-350 DEG C of progress water cooling, realizing reduces pipe residual stress, improves tubing toughness, reduces tubing hardness, obtains comprehensive
It can good continuous pipe product；Continuous pipe surface after cooling is finally applied into preservative, is crimped on continuous coiling machine,
The performance seamlessization for obtaining required length is continuously managed.
3. a kind of manufacturing method of the continuous pipe of performance seamlessization according to claim 2, it is characterised in that: (2)
In multi-pass heating and deformation process are carried out to steel band banjo fixing butt jointing specifically comprises the processes of: be heated rapidly to 890 ± 20 DEG C → from
So it is cooled to 840 ± 20 DEG C；Be heated rapidly to 940 ± 20 DEG C → naturally cool to 840 ± 20 DEG C；It is heated rapidly to 980 ± 20
Rolling or forging and pressing for 5-7 ton force is carried out to weld seam after DEG C；550-650 DEG C is heated rapidly to after natural cooling to anneal.
4. a kind of manufacturing method of the continuous pipe of performance seamlessization according to claim 2, it is characterised in that: (4)
In the continuous pipe tube body that is obtained by the thermo-mechanical rolling and hot tensile strength tube reducing of compression roller multi-pass include equal outer warp and change outer diameter
Two kinds；The external diametrical extent of the equal continuous pipe of outer diameters is Φ 25.4- Φ 88.9mm；Become outer diameter continuously to manage, single continuous pipe can be two
Kind or more outer diameter variation or be the linear continuous gradation of outer diameter, caliber range Φ 25.4- Φ 88.9mm.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110788571A (en) * | 2019-10-29 | 2020-02-14 | 武汉博金新材料科技有限公司 | Manufacturing method of ultrathin-wall H65 copper-zinc alloy oval tube by high-frequency induction welding |
| CN110788570A (en) * | 2019-10-29 | 2020-02-14 | 武汉博金新材料科技有限公司 | Welding process for ultrathin-wall internal thread TA2 titanium radiating pipe |
| CN111015110A (en) * | 2019-12-23 | 2020-04-17 | 西部金属材料股份有限公司 | Preparation method of metal pipe fitting difficult to deform |
| CN111321345A (en) * | 2020-03-05 | 2020-06-23 | 中国石油天然气集团有限公司 | Tempering type high-quality continuous pipe and manufacturing method thereof |
| CN111411307A (en) * | 2020-05-18 | 2020-07-14 | 中国石油天然气集团有限公司 | Antibacterial corrosion-resistant coiled tubing for well completion and manufacturing method thereof |
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| CN111321345A (en) * | 2020-03-05 | 2020-06-23 | 中国石油天然气集团有限公司 | Tempering type high-quality continuous pipe and manufacturing method thereof |
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| CN111411307A (en) * | 2020-05-18 | 2020-07-14 | 中国石油天然气集团有限公司 | Antibacterial corrosion-resistant coiled tubing for well completion and manufacturing method thereof |
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